linux-kernel - Re: [PATCH v14 02/11] x86: kdump: make the lower bound of crash kernel reservation consistent

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Message-ID: <20210218033233.GF2871@MiWiFi-R3L-srv>
Date:   Thu, 18 Feb 2021 11:33:52 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Chen Zhou <chenzhou10@...wei.com>
Cc:     mingo@...hat.com, tglx@...utronix.de, rppt@...nel.org,
        dyoung@...hat.com, catalin.marinas@....com, will@...nel.org,
        nsaenzjulienne@...e.de, corbet@....net, John.P.donnelly@...cle.com,
        prabhakar.pkin@...il.com, horms@...ge.net.au, robh+dt@...nel.org,
        arnd@...db.de, james.morse@....com, xiexiuqi@...wei.com,
        guohanjun@...wei.com, huawei.libin@...wei.com,
        wangkefeng.wang@...wei.com, linux-doc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v14 02/11] x86: kdump: make the lower bound of crash
 kernel reservation consistent

On 01/30/21 at 03:10pm, Chen Zhou wrote:
> The lower bounds of crash kernel reservation and crash kernel low
> reservation are different, use the consistent value CRASH_ALIGN.
> 
> Suggested-by: Dave Young <dyoung@...hat.com>
> Signed-off-by: Chen Zhou <chenzhou10@...wei.com>
> Tested-by: John Donnelly <John.p.donnelly@...cle.com>
> ---
>  arch/x86/kernel/setup.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index da769845597d..27470479e4a3 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -439,7 +439,8 @@ static int __init reserve_crashkernel_low(void)
>  			return 0;
>  	}
>  
> -	low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
> +	low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, CRASH_ALIGN,
> +			CRASH_ADDR_LOW_MAX);

Acked-by: Baoquan He <bhe@...hat.com>

>  	if (!low_base) {
>  		pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
>  		       (unsigned long)(low_size >> 20));
> -- 
> 2.20.1
>